The legal procedures were initiated by attorney Larry Williams II who claims that key persons were able to eavesdrop on his sworn testimony given during a client deposition via the FaceTime bug. Apple appears to have known about the problem since early last week, but it only issued a temporary fix on February 28, and a full patch is expected to be released later this week.
https://www.notebookcheck.net/Apple-gets-sued-over-FaceTime-critical-flaw.401851.0.html